
Bright, tangy, and silky smooth, this lemon curd is the kind of condiment that makes everything it touches taste more special — think toast, tarts, yogurt parfaits, or spooned straight from the jar. It gets its luscious, glossy body from cornstarch rather than egg yolks, which means it's naturally free from the animal proteins that can be a concern for people managing certain meat and protein sensitivities. Fresh lemon juice and zest do all the heavy lifting here, delivering that sharp citrus punch balanced by just enough butter and sugar to round everything out. The technique is straightforward: constant whisking over medium heat transforms a cloudy, thin liquid into a thick, translucent curd that coats a spoon beautifully. Straining the finished curd gives it that perfectly smooth, professional texture you'd expect from a bakery. It sets up firm and cold in the fridge, ready to spread, swirl, or dollop whenever inspiration strikes.
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Whisk together the sugar, cornstarch, and salt in a small saucepan until evenly combined. Add the water and lemon juice and whisk until the cornstarch is fully dissolved with no lumps visible.
Set the saucepan over medium heat and cook, whisking constantly, until the mixture thickens and turns from cloudy to translucent, about 6–8 minutes. Once it begins to bubble, continue whisking for 1 full minute — the curd should be thick enough to coat the back of a spoon and hold a clear line when a finger is drawn through.
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